The pop star rocks a Star of David pendant during a night out with beau Isaac Cohen in Hollywood. Plus: Paris & Nicole, Sienna Miller and more

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THE SINGLES SCENE

Hilary Duff enjoys the L.A. nightlife with sister Haylie on Monday, where the duo held court at hot spot Hyde Lounge. Since breaking up with Good Charlotte's Joel Madden last year, the singer says she's enjoying the dating scene, telling Ryan Seacrest on his radio show, "I kind of feel like a guy, like I can do it now."